This is a modification of https://opengameart.org/content/platformer-animations to reorganize the sprite sheet into something more reasonable, with each sequence of frames being on one line, though some sequences do share a line with another.

I also added a layer of labels in GIMP to make it easier to work with and expanded the standing animation from one frame to 4 (I figure letting the character blink and/or yawn from time to time isn't a bad idea).